NRX-UPPER-CROWN-COMPARAISON-INSERT

1. Study Overview
2. Simulation Setup
   - Geometry
   - Materials
   - Boundary Conditions
   - Loading
   - Mesh
3. Simulation Steps
4. Results
   - Stress Analysis
   - Displacement Analysis
   - Other Results
5. Conclusions
6. Appendix
   - Mesh Details
   - Material Properties
   - References

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🎯 Study Overview

• [Describe the study overview, including the expected outcomes]

Goal of the Study: Compare the stresses on the crown between upper with steel steer tube and upper with alluminum steer tube. Both model with maximum interference on the stanchions and steer tube.

Key Parameters:

• Inner diameter crown-steer tube= 35,78 mm
• Outer diameter steer tube = 39,945 mm
• Inner diameter crown-stanchions = 31,15 mm
• Outer diameter stanchions = 31,2 mm
• Diametral interference crown-steer tube = 0,2 mm
• Diametral interference crown-stanchions = 0,05 mm

Expected Outcomes:

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🔧 Simulation Setup

Geometry

• [Describe the geometry of the model]
  Geometry is the same for both models, it change only the material on the steer tube.
  

Materials

• [Describe the boundary conditions]

Property	Value	Unit
Name	Aluminum 6013 T6	-
Density	2.71	g/cc
Young Modulus	71000	MPa
Poisson Ratio	0.33

Property	Value	Unit
Name	Aluminum 6061 T6	-
Density	2.71	g/cc
Young Modulus	69000	MPa
Poisson Ratio	0.33

Property	Value	Unit
Name	Steel	-
Density	7.85	g/cc
Young Modulus	210000	MPa
Poisson Ratio	0.3

Boundary Conditions

• Fixed displacement on y on top of steer tube (magenta)
• Simmetry plane zy = Fixed rotations on y and z and displacement on x (green)
• Surface spring on zx on bearing supports (yellow)
• Surface spring on zy on top of the crown (sky blue)
  
• Fixed rotation on y and displacements x and y for reference point bottom stanchions (blue)

Loading

3 load conditions

• Only with interference fit, without loads

• Interference fit + F2=1000 N (along z direction)
  

• Interference fit + F1=-1000 N (along z direction)
  

Mesh

• [Describe the mesh details]
  Mesh Statistics:

• Element Type: [C3D20R] Stanchion + Steer tube

• Element Type: [C3D15] Crown interface Steer tube + Crown interface Stanchions

• Element Type: [C3D10] Crown

• Number of Elements: 390291
  Stanchion: 20768
  Steer tube: 18236
  Crown interface Steer tube: 4420
  Crown interface Stanchions: 9072
  Crown: 337795

• Number of Nodes: 769242
  Stanchion: 99474
  Steer tube: 87073
  Crown interface Steer tube: 16075
  Crown interface Stanchions: 32424
  Crown 534196

• Element Quality: [PERFECT - no distorted elements]

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📊 Simulation Steps

• [Describe simulation steps]

INSERTO MODEL

Step number / title	1 - First interference inserto solving
Iterations for convergence	4
Convergence criteria
notes	No added loading - Part fixed away from contact
Step number / title	2- Both interference + 1000N
Iterations for convergence	4
Convergence criteria
notes
Step number / title	3 - Both interference + -1000N
Iterations for convergence	4
Convergence criteria
notes

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📈 Results

Stress Analysis

ONLY WITH INTERFERENCE

Von Mises Stress

ALUMINUM STEER TUBE

Maximum Von Mises Stress: 280.2 MPa

STEEL STEER TUBE

Maximum Von Mises Stress: 438.4 MPa

SGN MAXIMUM ABSOLUTE PRINCIPAL STRESS

ALUMINUM STEER TUBE

Maximum SGN MAX ABS PRI Stress: 296.8 MPa
Minimum SGN MAX ABS PRI Stress: -234 MPa
STEEL STEER TUBE

Maximum SGN MAX ABS PRI Stress: 469 MPa
Minimum SGN MAX ABS PRI Stress: -357.5 MPa

F2=1000N

Von Mises Stress

ALUMINUM STEER TUBE

Maximum Von Mises Stress: 312.1 MPa

STEEL STEER TUBE

Maximum Von Mises Stress: 458.9 MPa

SGN MAXIMUM ABSOLUTE PRINCIPAL STRESS

ALUMINUM STEER TUBE

Maximum SGN MAX ABS PRI Stress: 296.8 MPa
Minimum SGN MAX ABS PRI Stress: -249.3 MPa

STEEL STEER TUBE

Maximum SGN MAX ABS PRI Stress: 429.8 MPa
Minimum SGN MAX ABS PRI Stress: -356.3 MPa

F1=-1000

Von Mises Stress

ALUMINUM STEER TUBE

Maximum Von Mises Stress: 277.5 MPa

STEEL STEER TUBE

Maximum Von Mises Stress: 458.9 MPa

SGN MAXIMUM ABSOLUTE PRINCIPAL STRESS

ALUMINUM STEER TUBE

Maximum SGN MAX ABS PRI Stress: 289.7 MPa
Minimum SGN MAX ABS PRI Stress: -247.7 MPa

STEEL STEER TUBE

Maximum SGN MAX ABS PRI Stress: 429.8 MPa
Minimum SGN MAX ABS PRI Stress: -356.3 MPa

Displacement Analysis

• [Analysis of displacement results]
  insert images

Maximum Displacement: [Maximum displacement value] mm

Other Results

• [Any other relevant results]

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🔍 Conclusions

• [Summary of the main findings]

Key Findings:

• [Key finding 1]

Recommendations:

• [Recommendation 1]

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📑 Appendix

Mesh Details

Material Properties

[Material 1 name]

References

1. [Reference 1]